Beam shaping of stack pulse laser diodes

Abstract

The research on beam shaping of stack pulse laser diodes (LDs), which have little emitter interval and bigger discreteness, by means of the technology of photolithography, filming, precision position adjusting and fiber cylindrical lens array, and on relative technologies are introduced in this paper. To obtain high peak power, which is in need of application fields such as laser ranging, laser fuse, laser guidance, gate imaging and laser radar, direct stacking pulse LDs are widely adopted, but the research on the relative beam shaping technology is done seldom. Owing to the micro-lens is processed once only during the fabrication and the range interval of it is fixed, technologies now available is difficult to take account of beam shaping and the interval discreteness of stack pulse LDs. The most advantageous of fiber cylindrical lens array introduced in this paper is that it can adjust precisely every unit in the array respectively according to the real emitting interval of stack pulse laser diodes, and carry out beam shaping effectively. After that the high effectively coupling of multi-mode fiber can be realized. Thus the practical effect of stack pulse LDs is improved in a large degree.